I have a buddy who bought a new 2005 Ridgeback back then, and when he put on the Mean Mother pipes and a new filter, he experienced serious clutch slippage. Our local dealer was stumped.
As it happened, we were going to Wichita that week, so when we got there we asked one of their test drivers. He confirmed that it was a common problem at that time, aggravated when people upped the torque with more open pipes.
He took us to the back of the warehouse, where he introduced us to their Director of Technology - who happened to have clutch parts spread all over the counter. He showed us the old clutch basket, and then the newer clutch spring, which was considerably stiffer.
From there, they took us to the Manager of Warranty Affairs, who agreed to ship the upgrade parts to our local dealer.
By the time we got back to Washinton state, the dealer had the new parts, but no idea why. We explained the whole process to them, and they installed the stiffer clutch spring - no more slippy. We also encouraged the dealer to get tighter with BDM, cause they were so great to work with - and they did just that - great dealer we have. :up:
As far as I know, the factory installed the stiffer clutch in all the bikes after that - sometime mid to late 2005, as I recall. When I'm at the factory next week, I'll ask for an update.
It doesn't surprise me that there are still some 2005's that experience slipping - probably all you need is that stiffer spring from BDM.